Friction-brake.



No. 683,736'. Patented oct. l, 190|.

.1. e. EBKEN.

FRICTION BRAKE.

(Application Bled Feb. 1B, 1901.1 (No Mqdal.)

' ATTORNEY.

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UNITED STATES PATENT @Enron roi-IN G. EBKEN, on PITTSBURG, PENNSYLVANIA,AsSIGNoE oF ONE-HALE To Jol-1N n. STEvENsoN AND HENRY w. sTEvENSoN, orSAME PLACE.

FRlCTlON-BRAKE.

SPECIFICATION forming part of Letters Patent No. 683,736, dated October1, 1901.

Application filed February 18 1901. Serial No. 47,744. @To model.)

To' if/ZZ whom, it may concern/ Beit known that I, JOHN G. EBKEN, acitizen' of the United States of America, residing at Pittsburg, in theAcounty of Allegheny and State of Pennsylvania, have invented certainnew and useful Improvements in Friction- Brakes; and I do hereby declarethe following to be a full, clear, and exact description thereof,reference being had to the accompanying drawings, which form a part ofthis specification.

This invention relates to certain new and useful improvements infriction-brakes for carriages and other vehicles.

The object of my invention is to provide a brake for the above class ofvehicles employing rubber tires.

In the accompanying drawings I have illustrated my improved brake, inwhich- Figure l is a side elevation of a portion of a vehicle-wheel,showing my brake in an inoperative position. Fig. 2 is an enlarged sideelevation of the same. Fig. 3 is a longitudinal sectional View throughthe same. Fig. 4 is a cross-section through the same.

In said drawings the numeral 1 designates a suitable crank-shaft havingthe square shoulder 2, the reduced rounded portion 8, the outer squareshoulder 4, and the threaded portion 5 thereon. Mounted upon the squareportion 2 of said crank-shaft is the disk 6. Loosely mounted upon therounded portion 3 of said shaft is the sleeve 7, carrying a key 8. Apair of shoes 9 and 10 are mounted upon said sleeve, each of which isprovided with a keyway to engage with the sleeve-key. The inner faceportion of one of these shoes is `provided with an annular ange 11,which engages within agroove 12 in the face of the other shoe. Annulargrooves 13 and 14. are formed within the inner faces of both shoes forthe reception of a spiral spring 15. Fitted upon the square shoulderedportion 4 of the shaft is a disk 16, which is secured in position by anut 17, applied to the threaded portion 5. A head 18 is tted over thecrankshaft and threaded securely to the shoe 10 and provided at itscenter with an extensionv or nut 22. Another head 19 is fittedthreadably upon the shoe 9 and is provided at its center with anextension or nut 20. These caps or heads 18 and 19 are designed toprotect the disks 6 and 16 from dirt, duc. The face portion of each shoewherein it is intended to engage with the wheel-tire is pro 5 5 videdwith radiating ribs 21. These ribs prevent the tire from slipping,especially when wet. The crank-shaft is suitably mounted to the vehiclebrake-beam and carries at each of its ends a brake of this construction.

When the brakes are brought into contact with the wheel-tire, the shoes9 and 10 rotate and have a tendencyto spread apart or be thrustsidewise, causing Ithe outer faces of said shoes to bear against thestationary disks 6 and 16, thereby creating snfticient friction to stopthe motion of the wheels, and as the brake-shoes rotate with said wheelsall possibility of tearing or cutting of the tires is prevented.

The object of the radiating ribs 2l is as heretofore described.

Thespiral spring having an outward pressure on the shoes preventsrattling, and the iiange 11 prevents sand or dirt entering 75 theworking parts between the shoes.

The construction of my improved brake is such that it may easily andquickly be taken apart for repairs. Again, the device is compact and notliable to get out of order.

A means for lubricating the disks on either side may be provided nearvthe periphery of each shoe part to preventa too-rapid wear of the same.

Having thus fully shown and described my invention, what I claim as new,and desire to secure by Letters Patent, is-

1. In a friction-brake having a shoe coinposed of two parts, rotatablymounted upon a shaft with non-rotatable friction-disks mount- 9o ed uponthe same shaft to engage the shoe parts; the heads secured to said shoeparts to inclose said disks; and an antirattler spring arranged betweensaid shoe parts, as shown and set forth. l

2. In a friction-brake having a shoe composed of two parts, rotatablymounted upon a shaft,with non-rotatable friction-disks mounted upon the.same shaft to engage the shoe parts; the heads secured to said shoeparts 10o to inclose the friction-disks; an annular flange upon theinner face of one of said parts to enter a groove in the other part; and`the antirattler-sprng arranged between said shoe parts, as shown andset forth.

3. In a friction-brake having a shoe composed of two parts rotatablymounted upon a shaft,with non-rotatable friction-disks mounted upon thesame shaft to engage the shoe parts; the heads secured to said shoeparts toinelose said disks; the ribs formed upon ro the wheel-engagingsurfaces of said shoe parts; an annular flange upon the inner face sam

